/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.lodsve.boot.io.support;

import org.I0Itec.zkclient.exception.ZkMarshallingError;
import org.I0Itec.zkclient.serialize.ZkSerializer;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * zookeeper中读取InputStream.
 *
 * @author Hulk Sun
 */
public class InputStreamSerializer implements ZkSerializer {
    private static final Logger logger = LoggerFactory.getLogger(InputStreamSerializer.class);

    @Override
    public byte[] serialize(Object data) throws ZkMarshallingError {
        if (!(data instanceof InputStream)) {
            return new byte[0];
        }

        try {
            return IOUtils.toByteArray((InputStream) data);
        } catch (IOException e) {
            if (logger.isErrorEnabled()) {
                logger.error(e.getMessage(), e);
            }
            return new byte[0];
        }
    }

    @Override
    public Object deserialize(byte[] bytes) throws ZkMarshallingError {
        return new ByteArrayInputStream(bytes);
    }
}
